1:34 PM,
Mar. 23, 2013

Mila Kunis and Ashton Kutcher, right, sit courtside together at the NBA game between the Phoenix Suns and Los Angeles Lakers in February.

Written by

USA Today

So the thing is, once you open the door, it's really hard to shut it again. Almost impossible, in fact. Which is why so many celebrities (Natalie Portman and Penelope Cruz, among them) refuse to reveal much about their private lives from the outset.

And then there's those who try to go back. We're talking about Ashton Kutcher, who flaunted his relationship with Demi Moore while the two were together. They professed their love for one another to anyone and everyone, on Twitter, in interviews, on red carpets, you name it.